JPS5821005A - Controller for hydraulic circuit - Google Patents
Controller for hydraulic circuitInfo
- Publication number
- JPS5821005A JPS5821005A JP11638281A JP11638281A JPS5821005A JP S5821005 A JPS5821005 A JP S5821005A JP 11638281 A JP11638281 A JP 11638281A JP 11638281 A JP11638281 A JP 11638281A JP S5821005 A JPS5821005 A JP S5821005A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- poppet
- poppets
- hydraulic pump
- hydraulic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 241000218645 Cedrus Species 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 230000007935 neutral effect Effects 0.000 description 6
- 238000003754 machining Methods 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は可変容量杉油圧ポンプとアクチュエータとの
間にポペットを有する開閉弁を設けた油圧回路を制御す
る装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for controlling a hydraulic circuit in which an on-off valve having a poppet is provided between a variable displacement cedar hydraulic pump and an actuator.
抽圧シ′ヨベル等では、１つの可変容量杉油圧ポンプ（
以下油圧ポンプという）で複数のアクチュエータを駆動
する場合があり、この場合には油圧ポンプと各アクチュ
エータとの間に開閉弁を設け、油圧ポンプの圧油を各ア
クチュエータに選択的に供給する。For extraction shovels, etc., one variable displacement cedar hydraulic pump (
In some cases, a plurality of actuators are driven by a hydraulic pump (hereinafter referred to as a hydraulic pump), and in this case, an on-off valve is provided between the hydraulic pump and each actuator, and pressure oil from the hydraulic pump is selectively supplied to each actuator.
第１図は従来の油圧回路の制御装置を示す図である。図
において１は油圧ポンプ、２，３はポンプ１に接続され
た油圧シリンダ、４，５は油圧シリンダ２，３の負荷、
６，７は油圧ポンプ１とシリンダ２，３とを接続する油
路を選択的に連通、遮断する開閉弁で、開閉弁６，７は
電磁弁６ａ、７ａ、ポペット６Ｌ ６ｃ＋−７ｂ、７ｃ
＋シヤトル弁６ｄ＊ ６ｅ、 ６ｆ。FIG. 1 is a diagram showing a conventional hydraulic circuit control device. In the figure, 1 is a hydraulic pump, 2 and 3 are hydraulic cylinders connected to the pump 1, 4 and 5 are loads on the hydraulic cylinders 2 and 3,
Reference numerals 6 and 7 are on-off valves that selectively communicate and shut off the oil passages connecting the hydraulic pump 1 and the cylinders 2 and 3, and the on-off valves 6 and 7 are solenoid valves 6a and 7a, and poppets 6L 6c+-7b and 7c.
+Shuttle valve 6d* 6e, 6f.
７ｔｉ＋ ７ｅ、 ７７から構成されている。８，９は
チェック弁、１０．１１はフラッシング弁、】２はチャ
ーシボ、ンプ、２０はリリーフ弁、１３．１４はリリー
フ弁、１５はタンク、１６．１７はそれぞれシリンダ２
１，３を操作するための操作レバー、１９はＭｔ作リレ
バー１６ ｌｒノ信号を入力して、油圧ポンプ１の斜板
傾転角制御装置１８および電磁弁６ａ、７ａに信号出力
する制御回路である。It consists of 7ti+7e and 77. 8 and 9 are check valves, 10.11 are flushing valves, ]2 are charcoal pumps, 20 are relief valves, 13.14 are relief valves, 15 are tank, 16.17 are cylinders 2 and 2, respectively.
1 and 3, and 19 is a control circuit that inputs the Mt operation lever 16 lr signal and outputs the signal to the swash plate tilting angle control device 18 of the hydraulic pump 1 and the solenoid valves 6a and 7a. be.
この制御装置においては、開閉弁６，７が閉の状態すな
わちポペット６ｂ、６ｃ、７ｂ、７ｃが閉シテいる状態
で、たとえば操作レバー１６を操作すると、電磁弁６ａ
が切換わって開閉弁６が開になるとともに、油圧ポンプ
１の吐出量、吐出方向が操作レバー１６の操作量、操作
方向によって制御されるので、シリンダ２の作動速度９
作動方向が操作レバー１６の操作量、操作方向によって
制御される。ところで、たとえばシリンダ２が油圧ショ
ベルのブームシリンダであると、フロント部を空中に保
持しているとき、シリンダ２にはフロント保持圧が作用
し、シリンダ２と開閉弁６とを接続する管路２１にはか
なりの大きさの圧力が加わる。一方、操作レバー１６が
中立のときには、油圧ポンプ１と開閉弁６とを接続する
管路２２の圧力は、リリーフ弁２０で設定された低い圧
力である。この状態で、電磁弁６ａを切換えてボペッ）
６ｂ、６ｃを開＜ト、管路２１と管路２２とか急に連
通ずるから、管路２１内の油の圧力か急激に降下するの
で、いわゆる膨張音か発生し、運転者に著しい不快感を
与える。In this control device, when the operating lever 16 is operated, for example, when the on-off valves 6 and 7 are closed, that is, the poppets 6b, 6c, 7b, and 7c are closed, the solenoid valve 6a
is switched and the on-off valve 6 is opened, and since the discharge amount and discharge direction of the hydraulic pump 1 are controlled by the operation amount and operation direction of the operation lever 16, the operating speed 9 of the cylinder 2 is changed.
The operating direction is controlled by the operating amount and operating direction of the operating lever 16. By the way, for example, if the cylinder 2 is a boom cylinder of a hydraulic excavator, when the front part is held in the air, front holding pressure acts on the cylinder 2, and the pipe 21 connecting the cylinder 2 and the on-off valve 6 is A considerable amount of pressure is applied to the On the other hand, when the operating lever 16 is in the neutral position, the pressure in the conduit 22 connecting the hydraulic pump 1 and the on-off valve 6 is the low pressure set by the relief valve 20. In this state, switch the solenoid valve 6a and
When 6b and 6c are opened, the pipes 21 and 22 suddenly communicate with each other, and the pressure of the oil in the pipe 21 drops rapidly, causing so-called expansion noise, which causes extreme discomfort to the driver. give.
第２図は従来の他の油圧回路の制御装置のポペットを示
す図である。このポペット６ｂにおいては、先端部に突
出部２３か設けられているがら、電磁弁６ａが切換わっ
たとき、始めは連通面積か徐々に大きくなるので、管路
２１と管路２２とか急に連通ずることはないため、管路
２工の圧力か急激に降下して膨張音が発生することがな
い。FIG. 2 is a diagram showing a poppet of another conventional hydraulic circuit control device. In this poppet 6b, although a protrusion 23 is provided at the tip, when the solenoid valve 6a is switched, the communication area gradually increases at first, so the conduit 21 and the conduit 22 suddenly become connected. Since there is no flow, the pressure in the two pipes will not drop suddenly and cause expansion noise.
しかしながら、との制御装置においては、ポペット６ｂ
の加工が面到になるとともＩと、通路の圧力損失が大き
くなるのを避けるために、ポペット６ｂのリスト量を大
きくとる必要があるから、開閉弁６を閉にするのに要す
る時間か長くなり、操作性が悪くなる。However, in the control device with poppet 6b
As the machining becomes more complete, it is necessary to increase the wrist length of the poppet 6b in order to avoid increasing the pressure loss in the passage, so the time required to close the on-off valve 6 becomes longer. This results in poor operability.
・、・ １ｌｌｉ１．’。・、・1lli1. '.
この発明は１蓮の問題点を解決するためになされたもの
で、開閉弁を開いたときに膨張音か発生することがなく
、またポペットの加工が容易である油圧回路の制御装置
を提供することを目的とする。This invention was made in order to solve one problem, and provides a control device for a hydraulic circuit that does not generate expansion noise when the on-off valve is opened and that allows easy machining of the poppet. The purpose is to
この目的を達成するため、この発明は操作手段よりＯＮ
信号が指令されると、予め設定された所定時間の間、予
め設定された周波数のパルス信号に応じて前記開閉弁の
ポペットの開閉を繰り返し、所定時間経過後は、操作手
段よりのＯＮ信号に基いて開閉弁のポペットを開の状態
に保持し、かつ、前記パルス信号の周波数は前記ポペッ
トの開閉が開閉弁のアクチュエータ側回路と開閉弁の可
変容虚形油圧ポンプ側回路との間の圧力差を徐々に減少
するように設定したものである。In order to achieve this objective, the present invention
When the signal is commanded, the poppet of the on-off valve is repeatedly opened and closed in response to a pulse signal of a preset frequency for a preset predetermined time, and after the predetermined time has elapsed, the poppet is opened and closed in response to an ON signal from the operating means. The poppet of the on-off valve is held open, and the frequency of the pulse signal is such that the opening and closing of the poppet corresponds to the pressure between the actuator side circuit of the on-off valve and the variable volume hollow hydraulic pump side circuit of the on-off valve. It is set so that the difference gradually decreases.
第３図はこの発明に係る油圧回路の制御装置を示す図で
ある。図において２４ 、２５は制御回路１９と電磁弁
６ａ、７ａとの間に設けら−れたスイッチ、２６゜２７
はスイッチ２４ 、２５の接点２４ｂ、２５ｂと電磁弁
６ａ。FIG. 3 is a diagram showing a control device for a hydraulic circuit according to the present invention. In the figure, 24 and 25 are switches provided between the control circuit 19 and the solenoid valves 6a and 7a;
are the contacts 24b and 25b of the switches 24 and 25 and the solenoid valve 6a.
７ａとの間に設けられたパルス発振器、２８．２９は操
作レバー１’６．１７が中立位置から操作されたのち所
定時間はスイッチ２４ 、２５を接点２４ｂ、２５ｂ側
に切換え、所定時間経過後はスイッチ２４ 、２５を接
点２４ａ。The pulse oscillator 28.29 provided between the control lever 1' and 7a switches the switches 24 and 25 to the contacts 24b and 25b side for a predetermined time after the operation lever 1'6.17 is operated from the neutral position, and after the predetermined time has elapsed. The switches 24 and 25 are connected to the contacts 24a.
−２５ａ側に切換える時間設定器、たとえばタイマであ
る。-25a side, such as a timer.
この制御装置においては、開閉弁６，７が閉の状態すな
わちボペッｈ ６ｂ、６．”ｌ ７！ｚ ７ｃが閉シテ
いる状態で、たとえば操作レバー１６を中立位置から操
作すると、制御回路１９がら電磁弁６ａに通電する信号
が出力される。すると、この信号でタイマ２８がスイッ
チ２４を接点２４ｂ側に切換え、制御回路１９の出力信
号がパルス発振器２Ｇに送られ、パルス発振器２６は予
め設定された周波数で０Ｎ−ＯＦＦノハルス信号を発振
する。このため、このパルス信号か電磁弁６ａに送られ
電磁弁６ａはタイマ２８に設定された所定時間の間、パ
ルス信号の周波数に応じてポペット６ｂ、６ｃが開閉を
繰り返すように間欠的に切換わる。なお、パルス発振器
２６のパルス信号の周波数は、ポペット６ｂ、６ｃの開
閉により、管路２１の圧力が急激に降下しないように設
定する。そして、操作レバー１６が中立位置がら操作さ
れたのち所定時間が経過すると、タイマ２８がスイッチ
２４を接点２４．側に切換え、制御回路１９の出力信号
か直接電磁弁６ａに送られるから、電磁弁６ａが切換わ
り、ポペット６ｂ、６ｃか完全に開となる。なお、タイ
マ２８の設定時間は、管路２１゜２２の圧力が同一とな
るのに要する最小の時間とすることか望ましい。さらに
、この状態で操作レバー１６を中立位置に戻すと、タイ
マ２８は作動せず、電磁弁６ａがすぐに元の位置に切換
わるから、ポペット６ｂ、６ｃはすぐに閉となる。In this control device, the on-off valves 6 and 7 are in the closed state, that is, the valves 6b, 6. For example, when the operating lever 16 is operated from the neutral position while the 7c is closed, the control circuit 19 outputs a signal that energizes the solenoid valve 6a.Then, this signal causes the timer 28 to turn on the switch 24. is switched to the contact 24b side, the output signal of the control circuit 19 is sent to the pulse oscillator 2G, and the pulse oscillator 26 oscillates an 0N-OFF nohalus signal at a preset frequency.Therefore, this pulse signal or the solenoid valve 6a The solenoid valve 6a is intermittently switched so that the poppets 6b and 6c repeat opening and closing according to the frequency of the pulse signal for a predetermined time set in the timer 28. The frequency is set so that the pressure in the conduit 21 does not drop suddenly due to the opening and closing of the poppets 6b and 6c.When a predetermined period of time has elapsed after the operating lever 16 was operated from the neutral position, the timer 28 turns the switch 24 on and off. is switched to the contact 24. side, and the output signal of the control circuit 19 is sent directly to the solenoid valve 6a, so the solenoid valve 6a is switched and the poppets 6b and 6c are completely opened.The set time of the timer 28 is It is desirable that the time required for the pressures in the conduits 21 and 22 to become the same is the minimum time required.Furthermore, if the operating lever 16 is returned to the neutral position in this state, the timer 28 will not operate and the solenoid valve 6a will close. Since the poppets 6b and 6c are immediately switched to their original positions, the poppets 6b and 6c are immediately closed.
以上説明したように、この発明に係る油圧回路の制御装
置においては、操作レバーか中立位置から操作されたの
ち所定時間は、ポペットか徐々に移動するから、油圧シ
リンダと開閉弁とを接続する管路の圧力が急激に降下す
ることがないので、膨張音が発生することがなく、運転
者に不快感を与えることかない。また、ポペットに突出
部を設ける必要がないから、ポペットの加工が容易であ
るとともに、ポペットのリフト量を大きくする必（）・
要かないので、開閉弁を閉にするのに要する時間か短く
、操作性がよい。このように、この発明の効果は顕著で
ある。As explained above, in the hydraulic circuit control device according to the present invention, after the operation lever is operated from the neutral position, the poppet gradually moves for a predetermined period of time, so that the pipe connecting the hydraulic cylinder and the on-off valve is Since the road pressure does not drop suddenly, no expansion noise is generated and the driver does not feel uncomfortable. In addition, since there is no need to provide a protrusion on the poppet, it is easy to process the poppet, and there is no need to increase the lift amount of the poppet, so the time required to close the on-off valve is shortened. Easy to operate. As described above, the effects of this invention are remarkable.
第１図は従来の油圧回路の制御装置を示す図、第２図は
従来の他の油圧回路の制御装置のポペ・ノドを示す図、
第３図はこの発明に係る油圧回路の制御装置を示す図で
ある。
１・・・可変容量杉油圧ポンプ
２．３・・・油圧シリンダ ６，７・・・開閉弁６（１
＋ ７Ｇ・・・電磁弁
６ｂ、６ｃ、７ｂ、７Ｃ・・・ポペ、７ト１６．１７・
・・操作レバー（操作手段）１８・・・斜板傾転角制御
装置
１９・・・制御回路 ２１．２２・・・管路２４
．２５・・・スイッチ ２６．２７・・・ノｆルス
発振器２８、２９・・・タイマ（時間設定器）代理人弁
理士 中村純之助
矛２図Fig. 1 is a diagram showing a conventional hydraulic circuit control device, Fig. 2 is a diagram showing a pope throat of another conventional hydraulic circuit control device,
FIG. 3 is a diagram showing a control device for a hydraulic circuit according to the present invention. 1... Variable capacity cedar hydraulic pump 2.3... Hydraulic cylinder 6, 7... Open/close valve 6 (1
+ 7G... Solenoid valve 6b, 6c, 7b, 7C... Pope, 7th 16.17.
...Operation lever (operation means) 18... Swash plate tilting angle control device 19 ... Control circuit 21.22 ... Pipe line 24
．． 25...Switch 26.27...Nof oscillator 28, 29...Timer (time setting device) Attorney Junnosuke Nakamura 2 diagram
Claims (1)
トを有する開閉弁を設けた油圧回路の前記開閉弁の０Ｎ
−ＯＦＦ制御を操作手段よりの信号によって行う油圧回
路の制御装置において、前記操作手段よりＯＮ信号が指
令されると、予め設定された所定時間の間、予め設定さ
れた周波数のパルス信号に応じて前記開閉弁のポペット
の開閉を繰り返し、所定時間経過後は、操作手段よりの
ＯＮ信号に基いて開閉弁のポペット、を開の状態に保持
し、かつ前記パルス信号の周波数は前記ポペットの開閉
が開閉弁のアクチュエータ側回路と開閉弁の可変容量杉
油圧ポンプ側回路との間の圧力差を除々に減少するよう
に設定したことを特徴とする油圧回路の制御装置。0N of the on-off valve of a hydraulic circuit in which an on-off valve with a poppet is provided between a variable capacity cedar hydraulic pump and an actuator.
- In a hydraulic circuit control device that performs OFF control by a signal from an operating means, when an ON signal is commanded from the operating means, the control device operates according to a pulse signal of a preset frequency for a preset predetermined time. The poppet of the on-off valve is repeatedly opened and closed, and after a predetermined period of time has elapsed, the poppet of the on-off valve is held in an open state based on an ON signal from the operating means, and the frequency of the pulse signal is such that the opening and closing of the poppet is controlled. A control device for a hydraulic circuit, characterized in that the pressure difference between the actuator side circuit of the on-off valve and the variable displacement cedar hydraulic pump side circuit of the on-off valve is set to gradually decrease.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11638281A JPS5821005A (en) | 1981-07-27 | 1981-07-27 | Controller for hydraulic circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11638281A JPS5821005A (en) | 1981-07-27 | 1981-07-27 | Controller for hydraulic circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5821005A true JPS5821005A (en) | 1983-02-07 |
Family
ID=14685617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11638281A Pending JPS5821005A (en) | 1981-07-27 | 1981-07-27 | Controller for hydraulic circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5821005A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60222602A (en) * | 1984-04-20 | 1985-11-07 | Toshiba Mach Co Ltd | Hydraulic circuit for changing over relationship between speed and torque for multiple hydraulic motor |
| JPS60232921A (en) * | 1984-05-04 | 1985-11-19 | Toshiba Mach Co Ltd | Screw speed/torque setting device for injection molder |
| US5287794A (en) * | 1990-07-24 | 1994-02-22 | Bo Andersson | Hydraulic motor with inlet fluid supplemented by fluid from contracting chamber |
| US6290942B1 (en) | 1998-05-28 | 2001-09-18 | Shin-Etsu Chemical Co., Ltd. | Carboxyl-bearing silicone emulsions method of making and hair preparations |
| JP2018168916A (en) * | 2017-03-29 | 2018-11-01 | 日立建機株式会社 | Hydraulic control device for construction machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5164190A (en) * | 1974-11-30 | 1976-06-03 | Toyoda Chuo Kenkyusho Kk | RYUTAIAKUCHUEETANOSEIGYOHOHO OYOBI SONOSOCHI |
| JPS5642704A (en) * | 1979-09-14 | 1981-04-21 | Hitachi Constr Mach Co Ltd | Controller in hydraulic circuit |
-
1981
- 1981-07-27 JP JP11638281A patent/JPS5821005A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5164190A (en) * | 1974-11-30 | 1976-06-03 | Toyoda Chuo Kenkyusho Kk | RYUTAIAKUCHUEETANOSEIGYOHOHO OYOBI SONOSOCHI |
| JPS5642704A (en) * | 1979-09-14 | 1981-04-21 | Hitachi Constr Mach Co Ltd | Controller in hydraulic circuit |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60222602A (en) * | 1984-04-20 | 1985-11-07 | Toshiba Mach Co Ltd | Hydraulic circuit for changing over relationship between speed and torque for multiple hydraulic motor |
| JPS60232921A (en) * | 1984-05-04 | 1985-11-19 | Toshiba Mach Co Ltd | Screw speed/torque setting device for injection molder |
| US5287794A (en) * | 1990-07-24 | 1994-02-22 | Bo Andersson | Hydraulic motor with inlet fluid supplemented by fluid from contracting chamber |
| US6290942B1 (en) | 1998-05-28 | 2001-09-18 | Shin-Etsu Chemical Co., Ltd. | Carboxyl-bearing silicone emulsions method of making and hair preparations |
| JP2018168916A (en) * | 2017-03-29 | 2018-11-01 | 日立建機株式会社 | Hydraulic control device for construction machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2003239905A (en) | Pressure control of instrument for hydraulic circuit | |
| JP4972544B2 (en) | How to swing the work machine | |
| JPH02164939A (en) | Hydraulic power excavator service valve circuit | |
| JPH08209751A (en) | Hydraulic flow priority system | |
| WO2021039284A1 (en) | Hydraulic system for construction machine | |
| JP3557167B2 (en) | Hydraulic circuits in work machines | |
| JPH01220706A (en) | Hydraulic excavator hydraulic control device | |
| JPS5821005A (en) | Controller for hydraulic circuit | |
| JP3545626B2 (en) | Hydraulic oil supply control device | |
| JPH10159805A (en) | Hydraulic device for working unit cylinder of construction machine | |
| JP2002276807A (en) | Travel controller | |
| JP3149974B2 (en) | Hydraulic circuit of excavator | |
| JPH04191503A (en) | Cut-off cancelling mechanism of load sensing system | |
| JPH0633905A (en) | Hydraulic circuit for special working device | |
| JPH09287175A (en) | Hydraulic pressure remote control circuit | |
| JP3724015B2 (en) | Response change device for pilot switching valve | |
| JPH108504A (en) | Control circuit of hydraulic shovel | |
| JPH09235759A (en) | Control circuit of construction machine | |
| KR0138161Y1 (en) | Hydraulic circuit that can adjust actuator speed according to working condition | |
| JPH0276906A (en) | Control circuit for hydraulic actuator | |
| JP2002286001A (en) | Swing drive | |
| JP3250772B2 (en) | Crane hydraulic circuit | |
| JPS6128081Y2 (en) | ||
| JP3250417B2 (en) | Hydraulic circuit of excavator | |
| JPS595164B2 (en) | Speed control circuit for cranes, etc. |